Top 100 Contractors in NAICS 325998: All Other Miscellaneous Chemical Product and Preparation Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 325998: All Other Miscellaneous Chemical Product and Preparation Manufacturing, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 77% of FY2021 NAICS 325998 contract dollars

Contract obligations: $248,250,702 Net of deobligations, by contracts coded NAICS 325998
Contractors: 497 Parent companies with an obligation
Largest contractor: Chemring Group PLC $121 million, 46.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Chemring Group PLC 3 awardees, including Kilgore Flares Company LLC, Alloy Surfaces Co Inc. and Chemring Australia PTY Ltd Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$120,617,322	46.1%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and not on the FY2025 list; unchanged since FY2020.
2	Security Signals, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$27,868,987	10.7%	Rank history: #8 in FY2022, #85 in FY2023, not on the FY2024 list and #37 in FY2025; unchanged since FY2020.
3	Transdigm Group Incorporated Through Armtec Countermeasures Co Top agencies Army (Department of the Army)	$15,863,536	6.1%	Rank history: #6 in FY2022, #1 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
4	Elbit Systems Ltd 2 awardees, including IMI Systems Ltd and Elbitamerica, Inc. Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$9,684,586	3.7%	Rank history: #7 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
5	Drew Marine USA Inc 2 awardees Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$9,425,673	3.6%	Rank history: #4 in FY2022, #4 in FY2023, #5 in FY2024 and #5 in FY2025; up 6 since FY2020.
6	Government of Canada Through Canadian Commercial Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$5,991,041	2.3%	Rank history: #20 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
7	Danaher Corporation 2 awardees, including Chemtreat, Inc. and Hach Company Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) WHS (DOD Washington Headquarters Service)	$3,336,927	1.3%	Rank history: #11 in FY2022, #9 in FY2023, #52 in FY2024 and not on the FY2025 list; up 9 since FY2020.
8	American Sanitary Products Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) DOS (Department of State)	$3,304,694	1.3%	Rank history: #17 in FY2022, #31 in FY2023, #4 in FY2024 and #25 in FY2025; up 1 since FY2020.
9	Government Sales, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DOJ (Department of Justice)	$3,265,314	1.2%	Rank history: #13 in FY2022, #10 in FY2023, #9 in FY2024 and #9 in FY2025; up 3 since FY2020.
10	Ecolab Inc. 2 awardees, including Championx LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DOJ (Department of Justice)	$3,182,329	1.2%	Rank history: #12 in FY2022, #11 in FY2023, #14 in FY2024 and #12 in FY2025; up 8 since FY2020.
11	IFE Group Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$2,123,053	0.8%	Rank history: #14 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
12	General Atomic Technologies Corporation Through General Atomics International Services Corp Top agencies USAF (Department of the Air Force)	$1,999,690	0.8%	Rank history: #21 in FY2022, #17 in FY2023, #32 in FY2024 and not on the FY2025 list; up 28 since FY2020.
13	Flir Systems Inc. Through Teledyne Flir Defense, LLC Top agencies Army (Department of the Army)	$1,877,553	0.7%	Rank history: #30 in FY2022, #12 in FY2023, #22 in FY2024 and not on the FY2025 list; down 5 since FY2020.
14	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$1,613,523	0.6%	Rank history: #24 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
15	KAP Technochem Usa, Inc. Top agencies Army (Department of the Army)	$1,225,758	0.5%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
16	Coastline Ltd. Top agencies Army (Department of the Army) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$1,214,453	0.5%	Rank history: #18 in FY2022, #13 in FY2023, #11 in FY2024 and #11 in FY2025; up 14 since FY2020.
17	Merck KG AUF Aktien 2 awardees, including Cerilliant Corporation and Sigma-Aldrich, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DHA (Defense Health Agency)	$1,194,993	0.5%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 16 since FY2020.
18	Af&S Products & Services, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,152,321	0.4%	Rank history: #62 in FY2022, not on the FY2023 list, #67 in FY2024 and #76 in FY2025; up 19 since FY2020.
19	Pierce Commercial Laundry Distributors, L.L.C. Top agencies Navy (Department of the Navy) Army (Department of the Army) GSA (General Services Administration)	$1,133,116	0.4%	Rank history: #23 in FY2022, #16 in FY2023, #30 in FY2024 and #34 in FY2025; up 3 since FY2020.
20	Teledyne Flir Defense, LLC Top agencies Army (Department of the Army)	$1,109,297	0.4%	Rank history: not on the FY2022–FY2025 lists; up 151 since FY2020.
21	Omni2Max, Inc. Top agencies USAF (Department of the Air Force)	$1,062,114	0.4%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
22	Vernas Ventures LLC 2 awardees, including Alphavets, LLC Top agencies GSA (General Services Administration) DLA (Defense Logistics Agency) Army (Department of the Army)	$1,032,991	0.4%	Rank history: not on the FY2022 list, #14 in FY2023, #12 in FY2024 and #28 in FY2025; new, not ranked in FY2020.
23	Royal Services Inc. Through Saniglaze International, LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DHS (Department of Homeland Security)	$906,007	0.3%	Rank history: #28 in FY2022, #30 in FY2023, #37 in FY2024 and not on the FY2025 list; up 69 since FY2020.
24	Paradise Pillow, Inc. Top agencies GSA (General Services Administration) DOS (Department of State) USAF (Department of the Air Force)	$732,287	0.3%	Rank history: #35 in FY2022, #21 in FY2023, #26 in FY2024 and #26 in FY2025; up 5 since FY2020.
25	LNT Solutions Limited Top agencies USAF (Department of the Air Force)	$699,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Island Pyrochemical Industries Corp Top agencies Navy (Department of the Navy)	$658,410	0.3%	Rank history: #19 in FY2022, not on the FY2023–FY2024 lists and #57 in FY2025; new, not ranked in FY2020.
27	Geo-Med, LLC Top agencies VA (Department of Veterans Affairs)	$605,865	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
28	VWR International LLC Top agencies HHS (Department of Health and Human Services)	$603,950	0.2%	Rank history: not on the FY2022 list, #47 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
29	Alexander/Ryan Marine & Safety Co. Through Drew Marine USA Inc. Top agencies Navy (Department of the Navy)	$594,460	0.2%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
30	Sky Mart Sales Corp. Top agencies DLA (Defense Logistics Agency)	$553,313	0.2%	Rank history: #74 in FY2022, #74 in FY2023, not on the FY2024 list and #32 in FY2025; new, not ranked in FY2020.
31	Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$539,761	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	Boelter Companies Inc. Through Citisco, LLC Top agencies VA (Department of Veterans Affairs) DECA (Defense Commissary Agency) USAF (Department of the Air Force)	$491,213	0.2%	Rank history: #37 in FY2022, #35 in FY2023, #80 in FY2024 and #45 in FY2025; up 2 since FY2020.
33	Downeast Logistics LLC Top agencies DLA (Defense Logistics Agency)	$478,628	0.2%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 26 since FY2020.
34	Seneca Mineral Company Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$476,634	0.2%	Rank history: #26 in FY2022, #19 in FY2023, #38 in FY2024 and #22 in FY2025; up 8 since FY2020.
35	Calgon Carbon Corporation Top agencies USAF (Department of the Air Force)	$467,968	0.2%	Rank history: #34 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
36	Teledyne Technologies Incorporated Through Teledyne Flir Defense, LLC Top agencies Army (Department of the Army)	$429,572	0.2%	Rank history: #22 in FY2022, not on the FY2023 list, #21 in FY2024 and #13 in FY2025; new, not ranked in FY2020.
37	Nalco Company LLC Top agencies SSA (Social Security Administration) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$407,646	0.2%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 93 since FY2020.
38	Quarles Petroleum Incorporated Top agencies Army (Department of the Army) DOI (Department of the Interior) VA (Department of Veterans Affairs)	$407,253	0.2%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 23 since FY2020.
39	Pointcare Systems Inc. Top agencies HHS (Department of Health and Human Services)	$391,467	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	R & M Government Services Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$384,000	0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
41	Fisher Darville Holdings Ltd Through Chela Ltd Top agencies USAF (Department of the Air Force)	$374,516	0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
42	Chemical Distributors Inc. Top agencies Army (Department of the Army)	$367,572	0.1%	Rank history: not on the FY2022 list, #68 in FY2023 and not on the FY2024–FY2025 lists; up 149 since FY2020.
43	Polydyne Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$360,944	0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
44	Barclay Water Treatment Company Inc Through Barclay Water Management, Inc. Top agencies VA (Department of Veterans Affairs)	$326,538	0.1%	Rank history: not on the FY2022 list, #83 in FY2023 and not on the FY2024–FY2025 lists; up 97 since FY2020.
45	Electroplating Consultants International Inc. Top agencies USAF (Department of the Air Force)	$310,309	0.1%	Rank history: #36 in FY2022, #52 in FY2023, #34 in FY2024 and #51 in FY2025; down 4 since FY2020.
46	Fidelis Sustainability Distribution LLC Top agencies VA (Department of Veterans Affairs)	$309,733	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Green and Sustainable Services, LLC Top agencies USAF (Department of the Air Force)	$308,422	0.1%	Rank history: #78 in FY2022, #43 in FY2023, #49 in FY2024 and #58 in FY2025; up 1 since FY2020.
48	Maryland Chemical Company, Inc. Top agencies Treasury (Department of the Treasury) Army (Department of the Army)	$280,369	0.1%	Rank history: #25 in FY2022, #37 in FY2023, #29 in FY2024 and #30 in FY2025; up 39 since FY2020.
49	Garden State Fireworks Inc. Top agencies Army (Department of the Army)	$279,875	0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	Premier & Companies, Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$268,001	0.1%	Rank history: #45 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
51	Alaska Garden & Pet Supply Inc. Top agencies USAF (Department of the Air Force)	$260,500	0.1%	Rank history: #51 in FY2022, #75 in FY2023, #74 in FY2024 and #64 in FY2025; new, not ranked in FY2020.
52	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$249,491	0.1%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; down 17 since FY2020.
53	International Chemstar Incorporated Top agencies Navy (Department of the Navy) Commerce (Department of Commerce) DHS (Department of Homeland Security)	$245,115	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
54	NCH Corporation 3 awardees, including Chem-Aqua Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$239,955	0.1%	Rank history: #64 in FY2022, not on the FY2023–FY2024 lists and #48 in FY2025; up 147 since FY2020.
55	Mcgean-Rohco Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$234,217	0.1%	Rank history: not on the FY2022–FY2025 lists; up 50 since FY2020.
56	Apergy Corporation Through Championx LLC Top agencies Navy (Department of the Navy)	$230,892	0.1%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
57	Daijin Co.,Ltd. Top agencies Navy (Department of the Navy)	$229,320	0.1%	Rank history: #69 in FY2022, #80 in FY2023, #88 in FY2024 and not on the FY2025 list; up 24 since FY2020.
58	Clariant AG Through Clariant Vertrieb (Deutschland) GMBH & Co. KG Top agencies USAF (Department of the Air Force)	$222,098	0.1%	Rank history: not on the FY2022 list, #26 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
59	S&Y Trading Corp of New Jersey Top agencies USAF (Department of the Air Force) Army (Department of the Army) DODEA (Department of Defense Education Activity)	$206,427	0.1%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
60	Midwest Industrial Supply Inc. Top agencies Army (Department of the Army)	$205,852	0.1%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
61	Compumeric Engineering, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$203,058	0.1%	Rank history: #31 in FY2022, #33 in FY2023, #35 in FY2024 and not on the FY2025 list; up 59 since FY2020.
62	Goad Company Top agencies USAF (Department of the Air Force)	$194,362	0.1%	Rank history: #49 in FY2022, #81 in FY2023, #75 in FY2024 and #56 in FY2025; down 4 since FY2020.
63	Fyve Star Inc. Top agencies USAF (Department of the Air Force)	$179,875	0.1%	Rank history: not on the FY2022 list, #97 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
64	KZN Insaat Taahhut Ticaret Ithalat Ihracat Sanayi Limited Sirketi Top agencies USAF (Department of the Air Force)	$176,000	0.1%	Rank history: not on the FY2022–FY2023 lists, #84 in FY2024 and not on the FY2025 list; up 16 since FY2020.
65	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$166,400	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$162,380	0.1%	Rank history: not on the FY2022–FY2025 lists; up 378 since FY2020.
67	V-Mac Contract Services, LLC Top agencies Army (Department of the Army)	$161,828	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Sifco Applied Surface Concepts, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$161,248	0.1%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 165 since FY2020.
69	Government Scientific Source Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) HHS (Department of Health and Human Services)	$159,558	0.1%	Rank history: not on the FY2022–FY2023 lists, #69 in FY2024 and not on the FY2025 list; down 23 since FY2020.
70	United Laboratories Inc. Top agencies USAF (Department of the Air Force)	$159,005	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Apex Pinnacle Corp Top agencies DLA (Defense Logistics Agency)	$152,682	0.1%	Rank history: not on the FY2022–FY2024 lists and #80 in FY2025; new, not ranked in FY2020.
72	W.r.a.i. Inc. Top agencies Navy (Department of the Navy)	$148,302	0.1%	Rank history: not on the FY2022–FY2025 lists; up 56 since FY2020.
73	Water Treatment Services Inc. Top agencies VA (Department of Veterans Affairs)	$146,587	0.1%	Rank history: #42 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; down 24 since FY2020.
74	Salt Industries, LLC Top agencies USAF (Department of the Air Force)	$139,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Sky Creative for Trading and Contracting Company Top agencies USAF (Department of the Air Force)	$137,452	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Vetpowered, LLC Top agencies USAF (Department of the Air Force)	$136,964	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	ATD American Co Top agencies GSA (General Services Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$128,370	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 162 since FY2020.
78	MJL Enterprises, LLC Top agencies Army (Department of the Army)	$127,133	<0.1%	Rank history: not on the FY2022–FY2024 lists and #72 in FY2025; down 10 since FY2020.
79	Citron Hygiene US Corp. Top agencies Treasury (Department of the Treasury) GSA (General Services Administration) HHS (Department of Health and Human Services)	$126,435	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
80	Suffolk Sales and Service Corporation Top agencies Navy (Department of the Navy)	$126,078	<0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 68 since FY2020.
81	Hawkins, Inc. Top agencies DOI (Department of the Interior)	$125,946	<0.1%	Rank history: not on the FY2022 list, #95 in FY2023, #99 in FY2024 and not on the FY2025 list; up 33 since FY2020.
82	Tattersall Supply, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$124,824	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 101 since FY2020.
83	Curtis Equipment Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$120,129	<0.1%	Rank history: #66 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; up 48 since FY2020.
84	Fire Ignition Resources LLC Top agencies USDA (Department of Agriculture)	$119,092	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 132 since FY2020.
85	Industrial Water Engineering, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$115,459	<0.1%	Rank history: not on the FY2022 list, #71 in FY2023 and not on the FY2024–FY2025 lists; up 26 since FY2020.
86	Up Enterprises LLC Top agencies Navy (Department of the Navy)	$114,622	<0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 111 since FY2020.
87	A-Brite Company Top agencies USAF (Department of the Air Force)	$114,554	<0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
88	Hakuto Co Ltd Top agencies Navy (Department of the Navy)	$114,361	<0.1%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
89	PCX Inc. Top agencies DLA (Defense Logistics Agency)	$111,525	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 185 since FY2020.
90	Hill Brothers Chemical Company Top agencies DOI (Department of the Interior)	$110,473	<0.1%	Rank history: #93 in FY2022, #100 in FY2023, #63 in FY2024 and not on the FY2025 list; down 5 since FY2020.
91	Texas General Trading FZE Top agencies USAF (Department of the Air Force)	$110,250	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	State Industrial Products Corp Top agencies Army (Department of the Army)	$110,230	<0.1%	Rank history: #73 in FY2022, #82 in FY2023, not on the FY2024 list and #84 in FY2025; up 7 since FY2020.
93	Uct, Inc. Top agencies USDA (Department of Agriculture)	$108,097	<0.1%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
94	Complete Environmental Products Inc. Top agencies DLA (Defense Logistics Agency)	$104,885	<0.1%	Rank history: #32 in FY2022, #25 in FY2023, #36 in FY2024 and #41 in FY2025; up 48 since FY2020.
95	Suez WTS USA Inc. Through Veolia WTS Usa, Inc. Top agencies DOJ (Department of Justice)	$102,243	<0.1%	Rank history: #88 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2020.
96	Cyclopure, Inc. Top agencies EPA (Environmental Protection Agency)	$100,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Enamine US Inc. Top agencies HHS (Department of Health and Human Services)	$99,955	<0.1%	Rank history: not on the FY2022–FY2024 lists and #79 in FY2025; new, not ranked in FY2020.
98	Tom Smith Fire Equipment Co Inc. Top agencies DOI (Department of the Interior)	$99,898	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Panacea Construction Group LLC Top agencies VA (Department of Veterans Affairs)	$99,860	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
100	M.v. Maschinen-Vertriebsgesellschaft MBH Top agencies USAF (Department of the Air Force)	$99,508	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 66 since FY2020.

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100 of 497 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $261 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 325998 contractors in FY2021?

1. Chemring Group PLC ($121M), 2. Security Signals, Inc. ($27.9M), 3. Transdigm Group Incorporated ($15.9M), 4. Elbit Systems Ltd ($9.68M), 5. Drew Marine USA Inc ($9.43M), 6. Government of Canada ($5.99M), 7. Danaher Corporation ($3.34M), 8. American Sanitary Products Inc. ($3.3M), 9. Government Sales, LLC ($3.27M), 10. Ecolab Inc. ($3.18M).

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